摘要
水泥土搅拌桩重力式支护墙适用于处理淤泥、淤泥质土、粉土和含水率较高且地基承载力标准值≤120kPa的黏性土等地基。该围护坑内无须支撑挖土,自身挡土兼隔水帷幕,可结合放坡卸土工程造价较低,挖土方便,近年来在软土地区得到越来越多的推广和应用。但由于软土地区搅拌桩成桩质量难以控制及淤泥质土中水泥土强度增长缓慢等原因,使得该支护墙在基坑支护中变形大,土体塌方等现象常有发生。以苏州市某基坑坍塌事故为例,对坍塌事故原因进行了分析。
Cement mixing pile retaining wall is suitable for processing mud, silt soil, silt and cohesive soil, which has higher moisture content and the bearing capacity of the foundation is less than 120 kPa, et al. This containment excavation doesn't need support digging, it can retain soil and stopped water. So, in recent years it has been used more and more in soft soil region, which can be used together with slope unloading soil. However, the quality of piles can not be controlled in soft soils, and the cement soil intensity grows slow in silt soil, the deformation is always large in practical application, and soil collapse and other phenomenon often occur: This paper takes an excavation accident in Suzhou as an example, and the analysis of the collapse accident are proposed.
出处
《施工技术》
CAS
北大核心
2013年第22期119-121,共3页
Construction Technology